TABLE 1.
Patients Demographics From the 3-Month Follow-up Cohort (n = 374)
| Age, years (mean ± SD) | 48.7 ± 17.1 |
| Male, n (%) | 219 (58.6) |
| Female, n (%) | 155 (41.4) |
| Ethnicity, n (%) | |
| Caucasian | 325 (86.9) |
| Black | 4 (1.1) |
| Asian | 14 (3.7) |
| Aboriginal | 0 (0.0) |
| Hispanic | 22 (5.9) |
| Caribbean | 2 (0.5) |
| East Indian | 3 (0.8) |
| Other/mixed | 1 (0.3) |
| Unknown | 3 (0.8) |
| Charlson Comorbidity Index (mean ± SD) (n = 363) | 2.1 ± 1.2 |
| Smoking status, n (%) | |
| Active | 26 (7.0) |
| Ancient | 36 (9.6) |
| Previous surgical status (n = 372), n (%) | |
| First surgery (virgin) | 234 (62.9) |
| Revision surgery | 138 (37.1) |
| Main tumor location (reclassified), n (%) | |
| C0-C2 | 31 (8.3) |
| C3-C6 | 15 (4.0) |
| C7-T2 | 30 (8.1) |
| T3-L5 | 205 (54.8) |
| S1-S5/coccyx | 93 (24.9) |
| ECOG performance status (n = 362), n (%) | |
| 0 | 130 (35.9) |
| 1 | 166 (45.9) |
| 2 | 43 (11.9) |
| 3 | 18 (5.0) |
| 4 | 5 (1.4) |
| 5 | 0 (0.0) |
ECOG, Eastern Cooperative Oncology Group.